Anyone know how to remove the oil filter cap for a N52 motor? I've gone to three parts stores AND the dealer with no luck. Strap wrench doesn't have enough grip, the oil filter wrench does no good.........dealer doesn't have a specialised removal cap. (and I have to go back and return all the crap I bought)

The damned thing is stuck on tight, and I'm ready to take a sledgehammer and whack the front end of the 325i.